Celtic's Martin O'Neill turns 74 on Sunday and to mark the occasion he is heading to Ibrox for the first time as a manager in 21 years.
The Northern Irishman has already beaten Danny Rohl's side this season as Celtic defeated 10-man Rangers 3-1 in the League Cup semi-final at Hampden in November during his first interim spell.
But the last time O'Neill managed a game against Rangers in Govan was way back in April 2005.
During his trophy-laden five-year spell in Glasgow, O'Neill led Celtic out for 11 Old Firm derbies at Ibrox, 10 in the top flight and one in the League Cup. He lost four, won six and drew one.
His first visit to the city's southside was a painful experience. After Celtic famously thumped Rangers 6-2 at Parkhead in O'Neill's debut derby, the Ibrox side exacted revenge three months later with a 5-1 rout in November 2000 to end Celtic's unbeaten run in the league.
O'Neill went on to win the next two Ibrox derbies before a 1-1 draw in March 2002. Then came another loss before three triumphant Ibrox visits in succession.
O'Neill's final season brought two Ibrox defeats, but he bowed out with a 2-1 victory thanks to goals from Stiliyan Petrov and Craig Bellamy.
If O'Neill's side can get the job done again this Sunday it would be the perfect birthday present.
Speaking at his media conference on Friday, O'Neill says he relishes matches at Ibrox "in a perverse sort of way".
"They're still great games and things to look forward to," he added. "But as the great Walter Smith once said, they are games to have relief at once they're over, particularly if you get a result.
"Of course you can be a bit euphoric, but I think relief might be the biggest way to describe it."